Amplification-free targeted enrichment and SMRT Sequencing of repeat-expansion genomic regions

Author(s): Clark, Tyson A. and Tsai, Yu-Chih and Hon, Ting and Bowman, Brett and Ziegle, Janet and Ekholm, Jenny and Korlach, Jonas

Targeted sequencing has proven to be an economical means of obtaining sequence information for one or more defined regions of a larger genome. However, most target enrichment methods are reliant upon some form of amplification. Amplification removes the epigenetic marks present in native DNA, and some genomic regions, such as those with extreme GC content and repetitive sequences, are recalcitrant to faithful amplification. Yet, a large number of genetic disorders are caused by expansions of repeat sequences. Furthermore, for some disorders, methylation status has been shown to be a key factor in the mechanism of disease.

Organization: PacBio
Year: 2018

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